From: Vishakha Channapattan <vishakhavc@xxxxxxxxxx>
A new sysfs variable 'ctl_mpi_state' is being introduced to
check the state of mpi.
Tested: Using 'ctl_mpi_state' sysfs variable we check the mpi state
linux-2dq0:~# cat /sys/class/scsi_host/host*/ctl_mpi_state
MPI is successfully initialized
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Vishakha Channapattan <vishakhavc@xxxxxxxxxx>
Signed-off-by: Viswas G <Viswas.G@xxxxxxxxxxxxx>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@xxxxxxxxxxxxx>
Signed-off-by: Ashokkumar N <Ashokkumar.N@xxxxxxxxxxxxx>
Signed-off-by: Radha Ramachandran <radha@xxxxxxxxxx>
Signed-off-by: kernel test robot <lkp@xxxxxxxxx>
---
drivers/scsi/pm8001/pm8001_ctl.c | 32 +++++++++++++++++++++++++++++++-
1 file changed, 31 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
index 12035baf0997..a93799bd3a32 100644
--- a/drivers/scsi/pm8001/pm8001_ctl.c
+++ b/drivers/scsi/pm8001/pm8001_ctl.c
@@ -41,6 +41,7 @@
#include <linux/slab.h>
#include "pm8001_sas.h"
#include "pm8001_ctl.h"
+#include "pm8001_chips.h"
/* scsi host attributes */
@@ -883,9 +884,37 @@ static ssize_t pm8001_show_update_fw(struct device *cdev,
flash_error_table[i].err_code,
flash_error_table[i].reason);
}
-
static DEVICE_ATTR(update_fw, S_IRUGO|S_IWUSR|S_IWGRP,
pm8001_show_update_fw, pm8001_store_update_fw);
+
+/**
+ * ctl_mpi_state_show - controller MPI state check
+ * @cdev: pointer to embedded class device
+ * @buf: the buffer returned
+ *
+ * A sysfs 'read-only' shost attribute.
+ */
+
+static const char *const mpiStateText[] = {
+ "MPI is not initialized",
+ "MPI is successfully initialized",
+ "MPI termination is in progress",
+ "MPI initialization failed with error in [31:16]"
+};
+
+static ssize_t ctl_mpi_state_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(cdev);
+ struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
+ struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
+ unsigned int mpidw0;
+
+ mpidw0 = pm8001_mr32(pm8001_ha->general_stat_tbl_addr, 0);
+ return sysfs_emit(buf, "%s\n", mpiStateText[mpidw0 & 0x0003]);
+}
+static DEVICE_ATTR_RO(ctl_mpi_state);
+
struct device_attribute *pm8001_host_attrs[] = {
&dev_attr_interface_rev,
&dev_attr_controller_fatal_error,
@@ -909,6 +938,7 @@ struct device_attribute *pm8001_host_attrs[] = {
&dev_attr_ob_log,
&dev_attr_ila_version,
&dev_attr_inc_fw_ver,
+ &dev_attr_ctl_mpi_state,
NULL,
};
--
2.16.3
